当钻迂大段地层的钻进速度很快时,你应该:()
A、适当控制钻进速度
B、改变钻井参数,以尽可能快的速度钻过该地层
C、保持原参数继续钻进
D、加大钻压
参考答案:A
— Excise me, but I haven't got the iPhone 4 ordered through the Internet.
— Sorry, madam, I'm sure you ____ have it by this Friday.[ ]
A. must
B. may
C. could
D. shall
我国现行的海上运输货物保险特别附加险不包括______。
A.舱面险 B.交货不到险C.提货不着险 D.进口关税险